So, I'd say that if Class F had been used then ASA/CASA would've been acknowledging that it was a temporary measure and that it would've been replaced by a higher classification (A-D) at some point.
That's not what "
is considered normally as a temporary measure only until such time as it can be replaced by air traffic control." means - i.e. it doesn't mean that the class F airspace itself is temporary and will be replaced.
It means that the aircraft will, along it's journey, soon be entering airspace in which air traffic control is provided. The note means that an aircraft flying from one airport to another, all in class F, won't normally be offered a traffic advisory service. An aircraft taking off from an airport in F, and climbing into class C will be offered the service in the F part of the flight as well as the C part of the flight.
This is what happens when I take off from or arrive into Inverness in the UK (in an RPT A320).